Function libffi::high::call::call

pub unsafe fn call<R: CType>(fun: CodePtr, args: &[Arg<'_>]) -> R

Performs a dynamic call to a C function.

To reduce boilerplate, see ffi_call!.

Examples

extern "C" fn hypot(x: f32, y: f32) -> f32 {
    (x * x + y * y).sqrt()
}

use libffi::high::call::*;

let result = unsafe {
    call::<f32>(CodePtr(hypot as *mut _), &[arg(&3f32), arg(&4f32)])
};

assert!((result - 5f32).abs() < 0.0001);